drcalculator.com

.com crawl

First seen 2026-04-17 · Last seen 2026-05-12 · ok HTTP/1.1 200 2273 ms crawled 2026-05-12

DE · 202.61.241.126 · AS197540 netcup GmbH

Reputation 100/100

sector finance type homepage

HTML metadata

Title: Dr Calculator
Description: Financial calculators including Karl's Mortgage Calculator
Language: en
Canonical: https://www.drcalculator.com/

Technology

Server: nginx

Registration

Registrar

Blacknight Internet Solutions Ltd.

Created

2004-09-28

Expires

2034-09-28 3052 days left

Updated

2025-01-03

Name servers

ns1.blacknightdns.com
ns2.blacknightdns.com
ns3.blacknightdns.com
ns4.blacknightdns.com

DNS records live

NS

ns1.blacknightdns.com
ns2.blacknightdns.com
ns3.blacknightdns.com
ns4.blacknightdns.com

Verified for

Google

Email authentication no MX

SPF: v=spf1 -all
strict (-all)
DMARC: v=DMARC1; p=reject;
policy: reject (enforced)
DKIM: no key found at common selectors

Certificate (current)

R12

from 2026-04-04 to 2026-07-03

Expires in 43 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 70/100 Checked live page: https://www.drcalculator.com/

present

strict-transport-security
x-frame-options
x-content-type-options

findings

missing Content Security Policy
missing Referrer Policy
missing Permissions Policy

Header values

x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=31536000; includeSubDomains

Linked from (1)

freedomclubusa.org×2